dan_paris In other words, time zone +1 E has been switched to +1 W in the mount controller when the ASIAIR synced to the mount. As a result, the local sidereal time is off by two hours.
I believe this is caused by a bug that I mentioned many months ago (perhaps more than a year), where ZWO coders did not distiinguish between the C trunc() function [the default C language casting from floating point numbers to integers] and the C round() function [that you have to explicitly call]. The two functions treat negative numbers between -1 and 0 differently from numbers between 0 and +1.
I.e., the problem affected those who live between the Greenwich (prime) Meridian and 1º East longitude.
I believe it was originally observed by some (professional) astronomer who stayed near Cambridge, England, and got move to the other side of the Greenwich meridian :-). He probably abandoned ASIAIR after that :-).
It is amazing that after all these years that ZWO still has no idea how to fix the problem.
Just keep pestering ZWO until they fix the bug. In the meantime, just use a different software that are written by people who know what they are doing.
Chen
